Results 261 to 270 of about 25,320 (296)

Measurement of complex permittivity of liquids. II

Journal of Physics E: Scientific Instruments, 1974
Improvements on the method of Lovell and Cole (1959) for the measurement of complex permittivity of liquids by means of the Boonton R-X Meter are presented. A new approach to the calibration of the cell and connecting line, considering ohmic losses, is described.
N L Federigi, G H Barbenza
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Biofilm Monitoring using Complex Permittivity

ECS Meeting Abstracts, 2008
Abstract not Available.
Graham Yelton, Pat Dolan, Susan Altman, Lucas McGrath   +3 more
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Complex permittivity measurements of two conifers

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
Complex permittivity measurements in the frequency range 1-10 GHz of two conifers, a 5.0 m high Balsam fir and a 1.9 m high spruce, are presented. With the large amount of measurement data it is possible to establish representative average values for the various parts of the considered trees.
A. Franchois, R. Lang, Y. Pineiro
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The Complex Permittivity of Polyethylene/Mica Composites

IEEE Transactions on Electrical Insulation, 1982
The complex relative permittivity ?*(f) of polyethylene/mica composites has been measured in the frequency range 10-2 to 107 Hz, as a function of mica content ?2 and prior sample conditioning. ?*(f) was found to display two main features: ?'-?' ?and K'' vary as fn-1 with 0.64?n?0.83 for all ?2, on account of the intrinsic dispersive properties of the ...
L. Paquin, H. St-Onge, M. R. Wertheimer
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Measurement of complex permittivity of liquid dielectrics

Microwave and Optical Technology Letters, 2002
AbstractThe complex permittivity of a number of liquid dielectrics has been measured with the use of the in‐waveguide technique at the X and Ku band. The TRL calibration procedure is applied for the calibration of the waveguide system. The measured results of permittivity of distilled water agree well with those published in the literature.
Yong Wang, Mohammed N. Afsar
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Characterization of coals by the study of complex permittivity

Fuel, 1987
Abstract In a study aimed at quantitative characterization of coals, the complex permittivity of non-demineralized coals was measured at variable frequency (5–107 Hz) and temperature (220–380 K). The results show that the polarization conductivity follows a law of the type σ′(ω) = Aωs.
Jean-Charles Giuntini, Jean-Victor Zanchetta, Sekou Diaby   +2 more
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Complex Permittivity and Dipole Correlations

1974
The relation of Glarum between macroscopic and microscopic relaxation functions has been derived by molecular response function theory, with effects of induced polarization included. A modified form of Zwanzig’s theory of rotational diffusion of interacting dipoles, based on Kirkwood’s theory of transport processes, is shown to give correlation ...
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Conditions and approximations for retrieving the complex permittivity and conductivity from the effective permittivity

2023
The electromagnetic characterization of materials, also known as dielectric spectroscopy, plays a key role in many applications. Its aim is to return either the effective permittivity or the effective conductivity over frequency for a sample of the material under investigation.
Giacomo Giannetti, Ludger Klinkenbusch
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Complex permittivity measurements in adaptive microwave complex

2011
Complex permittivity measurement issues are under review in this work. After considering of all existing methods it was decided to choose one of them, that according to the expert point of view is the most perspective one for usage in microwave technological complex which are performing temperature and microwave processing of oil-inwater emulsion ...
Morozov, Gennadiy A., Pyarnoya, A., Shakirov, A. S.   +2 more
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The Contemporary Definition of Complex Relative Permittivity

Journal of ASTM International, 2008
Abstract ASTM D150 [Standard Test Methods for AC Loss Characteristic and Permittivity (Dielectric Constant) of Solid Electrical Insulation, 2004] is the standard for measurement of alternating current (AC). Aimed at an analysis of this standard and proceeding from the information transmission characteristic of the dielectric, the ...
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